Proximity of galactic civilizations

The Rate of Star Formation.

Maarten Schmidt · The Astrophysical Journal · 1959 · 2.4K citations

Computing, Computer Science, Databases +12

Astrophysical quantities

D. Lynden-Bell · Journal of Atmospheric and Terrestrial Physics · 1974 · 1.6K citations

The Rate of Star Formation. II. The Rate of Formation of Stars of Different Mass.

Maarten Schmidt · The Astrophysical Journal · 1963 · 487 citations

Natural Sciences, Astronomy, Physics +10

Intelligent life in the Universe

E. Öpik · Planetary and Space Science · 1967 · 333 citations

Natural Sciences, Astronomy, Physics +12

Interstellar communication

I.M. Levitt · Journal of the Franklin Institute · 1963 · 77 citations